
class Settings():
    """存储外星人的所有设置类"""
    def __init__(self):
        """初始化游戏静态设置"""

        #屏幕的设置
        self.screen_width = 1300
        self.screen_height = 700
        self.bg_color = (230,230,230)

        #飞船的设置
        self.ship_speed_factor = 0.8
        self.ship_limit = 3

        #子弹设置
        self.bullet_speed_factor = 0.5
        self.bullet_width = 3
        self.bullet_height = 5
        self.bullet_color = 60,60,60
        self.bullet_allowed = 10

        #外星人设置
        #转到屏幕后外星人下降的速度
        self.fleet_drop_speed = 1

        #以什么样的速度加快游戏节奏
        self.speedup_scale = 1.1
        #外星人点数提高速度
        self.score_scale = 1.5

        #计分
        self.alien_points = 50

        self.initialize_dynamic_setting()

    def initialize_dynamic_setting(self):
        """初始化随游戏时间进而变化的设置"""
        self.ship_speed_factor = 1.5
        self.bullet_speed_factor = 3
        self.alien_speed_factor = 1

        #外星人移动方向：1向右移动，-1向左移动
        self.fleet_direction = 1

    def increase_speed(self):
        """提高速度设置"""
        self.ship_speed_factor *= self.speedup_scale
        self.bullet_speed_factor *= self.speedup_scale
        self.alien_speed_factor *= self.speedup_scale

        self.alien_points = int(self.alien_points * self.score_scale)
        print(self.alien_points)

        # 外星人移动方向：1向右移动，-1向左移动
        self.fleet_direction = 1
